当代大学生用英语可以表达为 "college student of today" 或 "contemporary college student"。
"college student" 是指在大学里学习的学生， "of today" 或 "contemporary" 是表示当代的意思。
例句：
"She is a college student of today, studying computer science at a prestigious university."
(她是一名当代大学生，在一所名牌大学学习计算机科学。)
"Contemporary college students face unique challenges, such as high tuition costs and a competitive job market."
(当代大学生面临着独特的挑战，如高高的学费和竞争激烈的就业市场。)